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Crash preventability determination

Skill x3fleetsafety/skills/skills/crash-preventability-determination

Open-source Agent Skills for DOT / FMCSA compliance. Drop in any AI coding agent (Claude Code, Cursor, Cowork) so it knows trucking regulations like a fleet safety pro.

Install
npx -y skills add x3fleetsafety/skills --skill crash-preventability-determination

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Use this skill when the user asks about FMCSA's Crash Preventability Determination Program (CPDP) — how to dispute that a crash was non-preventable, eligible crash types, evidence requirements, how preventability findings affect SMS scoring + safety ratings, the difference between "preventability" and "fault," and the National Crash Preventability Program. Cite FMCSA CPDP guidance.

SKILL.md

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Crash Preventability Determination Program (CPDP)

The CPDP lets a motor carrier submit a Request for Data Review (RDR) for certain crash types in the FMCSA's database. If the agency determines a crash was non-preventable, that crash is excluded from the carrier's Crash Indicator BASIC.

Why this matters

Crashes feed the Crash Indicator BASIC in SMS / CSA scoring. Even a non-fault crash counts AGAINST the carrier's score until a preventability determination is made. A successful "non-preventable" finding removes it from the BASIC and improves your score.

Eligible crash types (per FMCSA guidance)

Currently 16 crash types qualify for review:

  1. CMV struck on its side by another motorist in another lane going same direction
  2. CMV struck in the rear
  3. CMV struck while legally stopped or parked (including disabled along the road)
  4. CMV struck by a vehicle that crossed the center line or median
  5. CMV struck by a motorist driving the wrong direction
  6. CMV struck while legally stopped at a traffic control device (stop sign, traffic signal)
  7. CMV struck because another motorist was driving under the influence (where law enforcement document supports this)
  8. CMV struck because another motorist was experiencing a medical issue (heart attack, seizure, etc.)
  9. CMV struck because another motorist was distracted (texting, etc., if documented)
  10. CMV struck by cargo or equipment falling from another vehicle
  11. CMV struck because of an infrastructure failure (collapsing bridge, sinkhole, etc.)
  12. CMV struck by objects directed at the vehicle (rocks, debris, suicide attempt)
  13. CMV struck while avoiding a wrong-way driver, animal, or hazard
  14. CMV struck in a rear-end / off-set rear collision while CMV was decelerating in normal traffic
  15. CMV struck because the CMV was in a designated turn-only lane when struck
  16. CMV struck because of a mechanical failure on the OTHER vehicle (brake failure, tire blowout)

Required evidence

To submit a successful preventability determination request:

  • Police accident report (Form HS-1)
  • Photographs of damage to both vehicles + scene
  • Witness statements (if any)
  • Driver's own statement (signed)
  • Repair shop estimate (showing damage area)
  • ELD data showing the driver's behavior pre-crash (speed, hard events)
  • Telematics video if equipped (dash cam footage is gold)
  • Citation records showing the other driver received citations
  • Toxicology / DUI evidence if applicable

The agency staff reviewing the request needs to see CLEARLY that the CMV driver did everything reasonable; the cause was the other party.

How preventability scoring works

A crash determined "non-preventable" by FMCSA:

  • Is excluded from the carrier's Crash Indicator BASIC for SMS scoring
  • Still appears on PSP reports (Pre-Employment Screening Program)
  • Still counts in the carrier's accident register (49 CFR 390.15)
  • Does NOT affect insurance loss runs

A crash determined "preventable":

  • Continues to count in Crash Indicator BASIC
  • May trigger preventability training for the driver
  • May factor into a Safety Rating

How to submit

  1. Go to dataqs.fmcsa.dot.gov and sign in
  2. Find the crash in your carrier's record
  3. Click "Request a Data Review"
  4. Select "Crash Preventability Determination"
  5. Attach all evidence (PDF preferred)
  6. Submit

Decision typically within 60-120 days.

Difference: preventability vs fault

Preventability — could the CMV driver, through any defensive driving action, have avoided this crash? (FMCSA standard)

Fault — who legally caused the crash? (State law / insurance standard)

A driver may be not at fault but still could have prevented the crash. The other party caused it, but the CMV driver had time to brake / swerve / avoid. In that case: preventability determination would be "preventable" even though the other party was at fault.

Conversely: a driver could be at fault (e.g., signal violation) but the resulting crash was inevitable from another driver's drunk driving. Preventability might still be "non-preventable."

Common mistakes

  1. Filing without sufficient evidence. "We weren't at fault" is not enough; you need police report + photos + ELD data.
  2. Disputing every crash regardless of facts. The agency's win rate analysis weights how well-prepared each request is. Spamming weak requests hurts your future submissions.
  3. Confusing preventability with fault. Many carriers think their non-fault crash will be auto-preventable. Not always.
  4. Missing the eligibility window. Crashes must be eligible (one of the 16 types) AND recent enough to be in the SMS database (24-month rolling window).
  5. Failing to submit ELD data. When telemetry shows the CMV driver was driving at posted speed in correct lane = strong support.

Insurance + legal implications

A "non-preventable" finding by FMCSA does NOT bind insurance carriers or courts. Each insurance carrier conducts its own loss assessment. Each civil court determines fault separately.

But for CSA / FMCSA enforcement purposes, the non-preventable finding excludes the crash from BSI.

Where this fits in X3

X3's incidents.html page tracks each crash + collects evidence needed for CPDP submissions. The agent-dataq-drafter Edge Function can draft a preventability narrative based on:

  • The crash record
  • Police report uploaded
  • Telematics data ingested
  • Photos uploaded

For a high-stakes preventability determination (e.g., a multi-injury or fatality crash), recommend the user work with their DOT compliance attorney before submitting.

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This skill is published under the X3 Compass open skills initiative. Contributions welcome at https://github.com/x3fleetsafety/skills

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